In “chicago02: network structure analysis_networkx”, pysal is used to calculate the spatial distance weight when establishing the spatial weight between network routers. Pysal gives a variety of different methods to calculate the spatial weight, and involves a variety of spatial statistical models to analyze the spatial relationship between regions. However, the current content of pysal library analysis is vector objects. If there are multiple vector objects, they should be divided into two parts When analyzing the spatial relationship between an object and a substitute value, you need to code it yourself. This experiment needs to analyze the influence of 614…


Extracte 1 m high-precision building height data of Chicago from. Las radar data. It is necessary to pay attention to how to deal with a large amount of raster data in order to avoid memory overflow and the size of individual files. Here, several methods are added for geographic information data.

If a single raster file is too large, such as 100g, and cannot be read into memory at one time, it needs to be read in blocks, such as using rasterio.windows The method of the method;

Pay attention to the determination of the storage type of raster data, and…


Network structure (graph) can help to analyze the relationship between data, especially in the analysis of social network data. It can find the association between nodes. This node can be any data type to be analyzed, such as people and their social properties, geographical space and its attributes. Edge is the connection bridge between nodes, which indicates the attribute strength of connection between nodes, such as the degree of communication between people and the distance between regions. In this experiment, we analyzed the spatial distance relationship and contact degree of each park in the Chicago park system. In the calculation…


This experiment group chooses Chicago as the object of urban spatial structure analysis, the analysis content involved will be more systematic and rich, some code functions directly use the previous research results, and constantly add new research content. The urban structure of Chicago is significantly different from that of domestic cities. In the specific analysis, the differences will be identified, especially the comparison of analysis results will further determine the similarities and differences between them. …


Point of Interest is widely used in urban planning. It can be used for analysis and calculation, such as navigation and positioning, geocoding, perimeter search, heat analysis, density analysis, location decision analysis, etc.; it can also be used for visual display, such as light map, cluster map, etc.

At present, the technology of acquiring POI data of Internet electronic map has been relatively mature, and Python is widely used.

Here is a case of Hotel data collection.


Today, I am going to continue sharing a land surface temperature prediction model for green space planning evaluation based on machine learning regression algorithm.

Usually, after analyzing the relationship between LST and land cover (land use type), it can only be used as a guide for planning, which is difficult to implement. In fact, some studies have established regression models only to analyze whether there is a relationship between multiple variables and LST. If we migrate the face completion cases provided by scikit learn, can we predict the spatial distribution of LST according to the land cover type? Therefore, the…


When exploring the application of land surface temperature in the field of science, it is found that most of the studies are inclined to analyze the profile temperature or calculate the average temperature change of multiple buffer zones to explore the relationship between the surface temperature and land use (surface cover), but they are not included in specific areas, which is weak for guiding planning. Therefore, we carried out part of the exploration in this direction, and wrote a lot of code, not only convenient for data processing, but also explored some new methods. …


The method of suitability evaluation in urban security pattern is to combine all kinds of urban information and give corresponding weight to obtain the continuous value of urban suitability degree based on a certain direction analysis, such as suitability analysis of indicator species, evaluation of urban microclimate comfort, etc. This analysis method was derived from mchagrid’s Design Combined With Nature. With the development of GIS, it has become one of the main means to analyze the city. Based on this method, SIR model is introduced to analyze the dynamic process, and the range change of source point analysis spread is given after data condition superposition. In this case, convolution method and SIR model are used.

The process of expansion

Convolution kernel of SIR model


Whether returning farmland to forest or the damaged environment needs to be restored, the original vegetation community will be restored. Therefore, we should consider whether the relationship between the influence area and its surrounding environment is established in the restoration process. Since the corresponding value can be predicted according to the explanatory variables provided by regression prediction, can the unaffected environment around the restored land be used as the explanation variables? How about the prediction after the regression model is established by using the data from the regions with better environment? This case exploration is such a experience.

Technology

1…


In case 1, I introduce urban color analysis. Then we can explore intuitive impression next.

The method of clustering is used to extract the theme color of the image, and display it in the form of chart scatter to obtain the intuitive impression. In this case, two research routes were selected, one is Hupao in Hangzhou and the other is Biyun temple in Beijing. Using km= cluster.KMeans (n_ clusters=params[‘n_ Clusters’]. The “comparing different clustering algorithms on toy datasets” is transplanted to the calculation code of clustering part, which keeps the trace of migration as far as possible, so as to…

Jingyi Chen

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